We really have no idea why they decided to fire him.
From the story, it looks like a benign email with an apropos quote.
But while that could’ve indeed been the email, maybe he was also going around saying Apple is done, come join me in my new gig, Ive is dumb, etc.
And team members then complained it hurt their morale.
So Dye and Ive put their door down.
I’m not saying this is what happened. But do we really know the full story?